1、xctest client proxy error with: Error: connect ECONNREFUSED 127.0.0.1:8001
>> xctestwd start with port: 8001
>> xctest-client.js:224:14 [master] pid:23473 xcode version: 8.3.3
>> XCTestWD version: 1.1.3
>> xctest-client.js:172:14 [master] pid:23473 2017-09-06 13:25:53.829 xcodebuild[23972:1511642] IDETestOperationsObserverDebug: Writing diagnostic log for test session to:
/Users/iwm/Library/Developer/Xcode/DerivedData/XCTestWD-efsibylwwbocoagvfhextzqaiznx/Logs/Test/83B29A51-3E20-40D5-9FC5-8AF3FF9E65B7/Session-XCTestWDUITests-2017-09-06_132553-0OzQOm.log
>> xctest-client.js:173:14 [master] pid:23473 please check project: /usr/local/lib/node_modules/macaca-ios/node_modules/_xctestwd@1.1.3@xctestwd/XCTestWD/XCTestWD.xcodeproj
>> xctest-client.js:172:14 [master] pid:23473 2017-09-06 13:25:53.829 xcodebuild[23972:1511554] [MT] IDETestOperationsObserverDebug: (D95D65A7-8E60-4C4A-99F9-8625E6865131) Beginning test session XCTestWDUITests-D95D65A7-8E60-4C4A-99F9-8625E6865131 at 2017-09-06 13:25:53.829 with Xcode 8E3004b on target <DVTiPhoneSimulator: 0x7f926ffca720> {
SimDevice: SimDevice : iPhone 6 (916D2F3F-4FB9-4645-976B-0AE22822073B) : state={ Booted } deviceType={ SimDeviceType : com.apple.CoreSimulator.SimDeviceType.iPhone-6 } runtime={ SimRuntime : 10.3.1 (14E8301) - com.apple.CoreSimulator.SimRuntime.iOS-10-3 }
} (10.3.1 (14E8301))
>> xctest-client.js:173:14 [master] pid:23473 please check project: /usr/local/lib/node_modules/macaca-ios/node_modules/_xctestwd@1.1.3@xctestwd/XCTestWD/XCTestWD.xcodeproj
>> proxy.js:55:14 [master] pid:23473 Proxy: /wd/hub/session:POST to http://localhost:8001/wd/hub/session:POST with body: {"desiredCapabilities":{"bu...
>> proxy.js:61:22 [master] pid:23473 xctest client proxy error with: Error: socket hang up
>> xctest-client.js:172:14 [master] pid:23473 2017-09-06 13:26:15.954 xcodebuild[23972:1511565] IDETestOperationsObserverDebug: Writing diagnostic log for test session to:
/Users/iwm/Library/Developer/Xcode/DerivedData/XCTestWD-efsibylwwbocoagvfhextzqaiznx/Logs/Test/83B29A51-3E20-40D5-9FC5-8AF3FF9E65B7/Session-XCTestWDUITests-2017-09-06_132615-86y4Ws.log
>> xctest-client.js:173:14 [master] pid:23473 please check project: /usr/local/lib/node_modules/macaca-ios/node_modules/_xctestwd@1.1.3@xctestwd/XCTestWD/XCTestWD.xcodeproj
>> xctest-client.js:172:14 [master] pid:23473 2017-09-06 13:26:15.954 xcodebuild[23972:1511554] [MT] IDETestOperationsObserverDebug: (FC34FA0B-C27D-4C22-B1C4-603C0CD416F7) Beginning test session XCTestWDUITests-FC34FA0B-C27D-4C22-B1C4-603C0CD416F7 at 2017-09-06 13:26:15.954 with Xcode 8E3004b on target <DVTiPhoneSimulator: 0x7f926ffca720> {
SimDevice: SimDevice : iPhone 6 (916D2F3F-4FB9-4645-976B-0AE22822073B) : state={ Booted } deviceType={ SimDeviceType : com.apple.CoreSimulator.SimDeviceType.iPhone-6 } runtime={ SimRuntime : 10.3.1 (14E8301) - com.apple.CoreSimulator.SimRuntime.iOS-10-3 }
} (10.3.1 (14E8301))
>> xctest-client.js:173:14 [master] pid:23473 please check project: /usr/local/lib/node_modules/macaca-ios/node_modules/_xctestwd@1.1.3@xctestwd/XCTestWD/XCTestWD.xcodeproj
>> proxy.js:61:22 [master] pid:23473 xctest client proxy error with: Error: connect ECONNREFUSED 127.0.0.1:8001
>> proxy.js:61:22 [master] pid:23473 xctest client proxy error with: Error: connect ECONNREFUSED 127.0.0.1:8001
>> proxy.js:61:22 [master] pid:23473 xctest client proxy error with: Error: connect ECONNREFUSED 127.0.0.1:8001
>> xctest-client.js:172:14 [master] pid:23473 Failing tests:
>> xctest-client.js:173:14 [master] pid:23473 please check project: /usr/local/lib/node_modules/macaca-ios/node_modules/_xctestwd@1.1.3@xctestwd/XCTestWD/XCTestWD.xcodeproj
>> xctest-client.js:172:14 [master] pid:23473 -[XCTextWDRunner testRunner()]
** TEST FAILED **
>> xctest-client.js:173:14 [master] pid:23473 please check project: /usr/local/lib/node_modules/macaca-ios/node_modules/_xctestwd@1.1.3@xctestwd/XCTestWD/XCTestWD.xcodeproj
>> xctest-client.js:255:14 [master] pid:23473 killing deviceLogProc pid: 23973
>> xctest-client.js:260:14 [master] pid:23473 killing runnerProc pid: 23972
>> xctest-client.js:183:14 [master] pid:23473 xctest client exit with code: 65, signal: null
>> xctest-client.js:108:18 [master] pid:23473 simulator log process exit with code: null, signal: SIGKILL
>> proxy.js:61:22 [master] pid:23473 xctest client proxy error with: Error: connect ECONNREFUSED 127.0.0.1:8001
>> proxy.js:61:22 [master] pid:23473 xctest client proxy error with: Error: connect ECONNREFUSED 127.0.0.1:8001
>> proxy.js:61:22 [master] pid:23473 xctest client proxy error with: Error: connect ECONNREFUSED 127.0.0.1:8001
>> proxy.js:61:22 [master] pid:23473 xctest client proxy error with: Error: connect ECONNREFUSED 127.0.0.1:8001
>> proxy.js:61:22 [master] pid:23473 xctest client proxy error with: Error: connect ECONNREFUSED 127.0.0.1:8001
>> proxy.js:61:22 [master] pid:23473 xctest client proxy error with: Error: connect ECONNREFUSED 127.0.0.1:8001
>> proxy.js:61:22 [master] pid:23473 xctest client proxy error with: Error: connect ECONNREFUSED 127.0.0.1:8001
>> xctest-client.js:247:14 [master] pid:23473 Fail to start xctest: Error: connect ECONNREFUSED 127.0.0.1:8001
解决方法：
对于iOS平台，在模拟器上跑用例时 app的安装包需要基于.app包压缩后的zip包(这个.app包可以找对应的iOS开发同学提供，在XCode工程目录下Products目录下)，而不能用.ipa包进行压缩；
对于真机，可以直接使用.ipa文件，不过需要涉及证书签名等问题，关于这个，可参考https://testerhome.com/topics/6503。
另外，对于配置参数，iOS与安卓有各自特有的参数，具体配置信息可参考：desired-caps
2、官方常见问题汇总（https://macacajs.com/zh/faq）
